psql \dP: reference regclass with "pg_catalog." prefix
Strictly speaking this isn't a bug, but since all references to catalog
objects are schema-qualified, we might as well be consistent. The
omission first appeared in commit
1c5d9270e339, so backpatch to 12.
Author: Justin Pryzby <pryzbyj@telsasoft.com>
Discussion: https://postgr.es/m/
20210827193151.GN26465@telsasoft.com